TY - BOOK AU - Bureau of Indian Standards TI - Specification for Power Transformers: Part - 4 Terminal Markings, Tappings and Connections (IS : 2026 ( Part - 4) - 1977) Reaffirmed 1984 , Reaffirmed 1996 U1 - IS : 2026 (Part 4) - 1977 PY - 1977/// CY - New Delhi PB - Bureau of Indian Standards KW - Indian Standard - IT N1 - IS : 2026 (Part 4) - 1977 ER -